基于安全防诬码的加密广播方案

提出了一种基于安全防诬码的加密广播方案。针对一种特权用户集大小受限的广播情形,利用安全防诬码构造了一种(n,k)-弹性加密广播方案。该方案只要求广播中心传输一次加密信息、用户存储一个密钥,就可完成广播任务。此外,特权用户集生成解密密钥的过程中,广播中心无需广播任何消息。相对于已有方案具有更低的系统带宽需求和存储复杂度。

Encryption Broadcast Scheme Based on Secure Frameproof Codes

This paper presents an encryption broadcast scheme based on secure frameproof codes.Using the secure frameproof codes,an (n,k)-resilient encryption broadcast scheme is constructed,which is applicable for an especially encryption broadcast situation where the privilege user set has an upper bound.The scheme can accomplish the broadcast task if the broadcast center transmits the encrypted message one time and the user stores only one key.And when the privileged user set recovers the decryption key,the broadcast center need not broadcast any message.The broadcast system bandwidth requirement and memory complexity are less than the existing schemes.